package com.wl.blog.web.admin;

import com.wl.blog.po.Tag;
import com.wl.blog.po.Type;
import com.wl.blog.service.TagService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.web.PageableDefault;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.validation.Valid;

@Controller
@RequestMapping("/admin")
public class TagController {

    @Autowired
    private TagService tagService;

    @GetMapping("/tags")
    public String tags(@PageableDefault(size = 6, sort = {"id"},
            direction = Sort.Direction.DESC) Pageable pageable, Model model) {

        model.addAttribute("page", tagService.listTag(pageable));
        return "admin/tagsManager";
    }

    @GetMapping("/tags/input")
    public String tagsInput(Model model)
    {
        //前端需获取tag的name属性
        model.addAttribute("tag", new Tag());
        return "admin/tagsInput";
    }

    @PostMapping("/tags")
    public String addTag(@Valid Tag tag, BindingResult result, RedirectAttributes attributes) {
       Tag tag1 = tagService.getTagByName(tag.getName());
        if(tag1 != null) {
            //BindingResult 添加自定义错误信息
            result.rejectValue("name","nameError","已存在标签不能重复添加");
        }

        //后端校验结果返回,与实体类上@NotBlank(message = "标签名称不能为空")结合使用
        if (result.hasErrors()) {
            return "admin/tagsInput";
        }

        Tag t = tagService.saveTag(tag);
        if (t == null){
            attributes.addFlashAttribute("message","新增失败");
        } else {
            attributes.addFlashAttribute("message","新增成功");
        }
        return "redirect:/admin/tags";
    }

    @GetMapping("/tags/{id}/input")
    public String editInput(@PathVariable Long id, Model model) {
        model.addAttribute("tag", tagService.getTag(id));
        return "admin/tagsInput";
    }

    @PostMapping("/tags/{id}")
    public String editPost(@Valid Tag tag, BindingResult result,@PathVariable Long id, RedirectAttributes attributes) {
        Tag tag1 = tagService.getTagByName(tag.getName());
        if(tag1 != null) {
            //BindingResult 添加自定义错误信息
            result.rejectValue("name","nameError","已存在标签不能重复添加");
        }

        //后端校验结果返回,与实体类上@NotBlank(message = "标签名称不能为空")结合使用
        if (result.hasErrors()) {
            return "admin/tagsInput";
        }

        Tag t = tagService.updateTag(id,tag);
        if (t == null){
            attributes.addFlashAttribute("message","更新失败");
        } else {
            attributes.addFlashAttribute("message","更新成功");
        }
        return "redirect:/admin/tags";
    }


    @GetMapping("/tags/{id}/delete")
    public String delType(@PathVariable Long id, RedirectAttributes attributes) {
        tagService.deleteTag(id);
        attributes.addFlashAttribute("message","删除成功");
        return "redirect:/admin/tags";
    }

}
